Improved mechanical adjustment



Witnesses:

Inventor'.

starting or stopping may be adj usted without changing t. i "avia WILBUR RPARKER, OFYMERIDEN, CONNECTICUT.

Letters .Patent No. 86,098,

elated .Tamm/ry 19, 1869.

IMPROVED .MECHANICAL ADJUSTMENT.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom 'tt ma/y concern:

Beit known that I, WILBUR F. PARKER, of Meriden, in the county of New Haven, and State of Gonnecticut, have invented a new Mechanical Adjustment; and I do hereby declare the following, when taken in connection with the accompanying drawings, and the letters of reference marked thereon, to bea full, clear,l and exact description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure l, a front View;

Figure 2, a side view;

Figure 3, a longitudinal central section;

Figure 4, a transverse section on line :v :c and in Figures 5 and, an additional adjustment.

This invention relates to an improvement in the adf justmcnt of crank-shafts, that is, a shaft from which a reciprocating movement is imparted, so that, by the said adjustment, the point of starting and stopping of the said reciprocating movement may he changed without changing the time or extent of the said reciprocating movement; and

The invention consists, first, in combining with a shaft, constructed and arranged so as to impart a reciprocating movement, an eccentric-sleeve or bearing, within which the shaft freely revolves, and so that, by turning the said eccentric-bearing, the relative position of the shaft may be changed, without changing the time or extent of the reciprocating movgment. j

Also, in combining with a shaft,'arranged so ,as to impart a reciprocating movement, by means of a crankr or otherwise, a box orslide applied to the said crank, so that, by the adjustment ofthe said slide, thepoint of the time or extent of the movement imparted by the said crank or eccentric.

The uses of this adjustment are various, and it will be seen, by those skilled in the use of machinery, that it may be applied to many 4different machines, where a simple and nice adjustment of a reciprocating move ment is required.

To enable others skilled in the art to fully understand my invention, I will proceed to describe the same, as illustrated in the accompanying drawings.

A is the shaft, to one end of which a Wrist-pin, crank, or eccentric, B, is formed or attached, and the said shaft is arranged eccentrically in a sleeve, C, (see figs. 3 and 4,) and so as to revolve freely therein, the said eccentric being supported in any convenient manner-here represented in a head, D.

The reciprocating movement imparted from the revolution of the shaft, by the crank B, or its equivalent, is fixed and uniform. For many purposes, and in many machines, it is frequently desirable to change the point of starting and stoppin g of such motion without changing the time or extent. With the shaft thus arranged,

it is only necessary to turn the eccentric-sleeve 0, which will change the position of the shaft according to the extent of the eccentric; that is to say, bya one-half revolution of the eccentric-sleeve, the position of the shaft will bechanged to the position showninred, fig. 4, consequently, to that extent, changing the point of starting and stopping of the reciprocating movement imparted by the crank.

For a nice adjustment, or convenient arrangement of the adjusting-sleeve C, I fix upon one end, or in some convenient position onthe said sleeve, atoothed Wheel, E, which is concentric to the said sleeve; and in a corresponding position, so as to work in the teeth of the said wheel, I arrange a screw or worm, F, by the turning of which thc'eccentric is adjusted, as and for the purpose before described.

The second part of my invention, which I illustrate in figs. 5 and 6, I show as applied to operate a slide,

G, and adj ust its movement, in which said slide a re` cess, H, is formed, into which a block, I, is placed, so.

as to work laterally'therein; and in the said block', in an inclined recess, I arrange a'I second block, J, in which said box or block, J, a wrist-pin or crank, B, is set, so that, by the turning of the shaft, the`slideG is raised and lowered, as denoted in red and blue, fig. 5.

In fig. ,5, the block I is represented as centrally fixed by means of the pin a, half -of which is in the slide, and half in the block I. This prevents any movement of lthe said block. Therefore, as the shaft, with the crank B, turns, the block J will slide in its recess to the position in red, back to the position in blue, up and down the incline.

Now, it will be evidentthat if the position of the.

block I be changed to the right or left, without the movement of the shaft, it will necessarily raise or lower the slide G, according to the direction in which the said block I is moved; that is to say, if moved to" the right, so as to carry the block J up the incline, the slide will be lowered, and cioe ccrsa,'and, when set in proper position, the pin c is inserted to confine the block in such position. Thus, it will be seen that the position of the slide G will be changed without changing the throw or extent of the reciprocating movement imparted by the crank B.

Another adjustment of the same device is seen in fig. 6,7wl1ere the block Iis ixed to the block J by means of the saine pin a, and the Ysame result -is attained.

The advantages of this adjustment, and-its applicaf tion to many classes of machinery, are too apparent to those skilled in mechanical adjustments to require mention here.

Having fully described my invention,

What I claim as new and useful, and desire to secure by Letters Patent, is

l. The eccentricsleeve or bearing C and shaft A, in

combination with means of imparting a reciprocating Stopping of the reciprocating movement imparted by movemenago that, by the turning of the said ecceu-v the said crank, Without changing the extent of the tric, the reciprocating motion is adjusted without chang said movement. v

ing its extent, substantially as herein set forth.

WILBUR F. EARKER.y 2. In combination witha crank, or its equivalent, Y Witnesses:

the arrangement of the two blocks, I and J, oon- JH. SHUMWAY, structed so as to adjust the points of starting and A. J. TIBBI'BS. 

